Power transformer

Abstract

The invention relates to the field of transformers, in particular to a power transformer which comprises a main oil tank, two supporting rods are vertically fixed to the right side face of the main oil tank, a transverse base penetrates through the two supporting rods in a sliding mode, arm plates are fixed to the two ends of the transverse base, and a plurality of heat dissipation plates are vertically fixed to the two arm plates. Each heat dissipation plate is in contact sliding with the corresponding side face of the main oil tank, a mounting plate is fixed between the two supporting rods, a power shaft is rotationally arranged on the mounting plate, a rotating plate is fixed to the upper end of the power shaft, a shifting pin is fixed to the position, staggered with the power shaft, of the rotating plate, and the shifting pin slides in a long sliding hole in the transverse base. According to the invention, the heat dissipation effect can be ensured under the condition that external air does not flow.

Description

Technical Field

[0001] The present invention relates to the field of transformers, in particular to a power transformer. Background Art

[0002] During the use of power transformers, the current undergoes electromagnetic conversion through the primary and secondary windings and the silicon steel core. Part of the electrical energy will be converted into useless heat energy. If measures are not taken to dissipate this heat as soon as possible, it will have an adverse effect on the performance of the transformer and the safety of electricity use.

[0003] At present, in order to improve the heat dissipation efficiency of transformers, most transformers will fix multiple heat sinks on the outer side of the main oil tank to improve the heat dissipation efficiency. However, since the multiple heat sinks are relatively fixed to the main oil tank, the air flow between two adjacent heat sinks is poor. Therefore, when the external air does not flow, the heat dissipation effect is limited. Summary of the Invention

[0004] The object of the present invention is to provide a power transformer which can ensure heat dissipation effect when external air does not flow.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A power transformer includes a main oil tank. Two support rods are vertically fixed on the right side of the main oil tank. A horizontal seat slides through the two support rods. Arm plates are fixed at both ends of the horizontal seat. Multiple heat sinks are vertically fixed on the two arm plates. Each heat sink slides in contact with the corresponding side of the main oil tank.

[0007] A mounting plate is fixed between the two support rods, a power shaft rotates on the mounting plate, a rotating plate is fixed on the upper end of the power shaft, a toggle pin is fixed at the position where the rotating plate is offset from the power shaft, and the toggle pin slides in the long sliding hole on the horizontal seat.

[0008] Two connecting holes are horizontally provided on both the front and rear side surfaces of the main oil tank, and the two connecting holes on the same side are respectively located on the upper and lower sides of the heat dissipation plate, and an extension box is installed at each connecting hole through a buckle plate.

[0009] A connecting pipe is rotatably connected between the two extension boxes on the same side.

[0010] A hollow fin plate is extended outward from the middle of each communicating pipe.

[0011] A sliding column frame is fixed on the side of each communicating pipe away from the fin plate, and each sliding column frame penetrates and slides in a sliding hole on the corresponding arm plate.

[0012] The lower end of each connecting pipe is located at the extension box and is fixed with a dial plate on the side away from the fin plate. A piston plate slides in the extension box below. A spring I is provided between the piston plate and the corresponding buckle plate to make the piston plate press against multiple dial plates. A one-way mechanism is provided at the piston plate and the lower end of the connecting pipe, so that the transformer oil can only enter the extension box below from the main oil tank, and then enter the connecting pipe from the extension box below.

[0013] The one-way mechanism includes a cavity tube, in which a semicircular plug slides. A spring II is provided between one end of the cavity tube and the semicircular plug, so that the semicircular plug presses tightly to seal the other end of the cavity tube.

[0014] Each fin plate is provided with a column cavity away from the end of the communicating pipe.

[0015] A spiral rack rotates in each column cavity, and the central axis of each spiral rack passes through the lower end of the corresponding wing plate. The lower end of the central axis of each spiral rack rotates a transmission wheel through a one-way bearing. A plurality of fixed tooth plates are fixed on the extension box below, and the plurality of fixed tooth plates are respectively engaged with the plurality of transmission wheels for transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 and Figure 2 It is a schematic diagram of the structure of a power transformer;

[0017] Figure 3 This is a schematic diagram of the local structure of a power transformer. Figure 1 ;

[0018] Figure 4 It is a structural diagram of the main fuel tank;

[0019] Figure 5 It is a structural diagram of the cross seat, arm plate and heat sink;

[0020] Figure 6 This is a schematic diagram of the local structure of a power transformer. Figure 2 ;

[0021] Figure 7 It is a structural diagram of the extension box, the pinch plate and the piston plate;

[0022] Figure 8 It is a structural diagram of the piston plate and the one-way mechanism;

[0023] Figure 9 It is a structural diagram of the connecting tube, fin plate and spiral frame.

[0024] In the picture:

[0025] Main oil tank 101; communicating hole 102; supporting rod 103;

[0026] Horizontal seat 201; arm plate 202; heat sink 203; sliding hole 204; long sliding hole 205; power shaft 206; rotating plate 207; toggle pin 208;

[0027] Extension box 301; gusset plate 302;

[0028] Piston plate 401; spring I 402; cavity tube 403; semicircular plug 404; spring II 405;

[0029] Connecting pipe 501; fin plate 502; column cavity 503; sliding column frame 504; dial plate 505; spiral frame 506; transmission wheel 507. DETAILED DESCRIPTION

[0030] like Figure 1-9 As shown, the power transformer is described in detail:

[0031] A power transformer includes a main oil tank 101. Two support rods 103 are vertically fixed to the right side of the main oil tank 101. A horizontal seat 201 slides through the two support rods 103. Arm plates 202 are fixed at both ends of the horizontal seat 201. Multiple heat sinks 203 are vertically fixed to the two arm plates 202. Each heat sink 203 contacts and slides with the corresponding side of the main oil tank 101.

[0032] The main oil tank 101 is equipped with windings and is filled with transformer oil. The upper end of the main oil tank 101 is provided with a sleeve and the lower end is provided with a mounting base for mounting the transformer.

[0033] The plurality of heat sinks 203 are in contact with and connected to the front and rear sides of the main oil tank 101, so that the heat generated in the main oil tank 101 can be transferred to the plurality of heat sinks 203 for heat dissipation, making the plurality of heat sinks 203 equivalent to the heat sinks fixed on an ordinary transformer. When the external air does not flow, the transmission cross seat 201 can slide back and forth on the two support rods 103, and the two arm plates 202 can drive the plurality of heat sinks 203 to slide back and forth in the left and right directions on the front and rear sides of the main oil tank 101, so that the heat sink 203 can maintain contact with the outer side surface of the main oil tank 101 to absorb heat, dissipate heat from the transformer, and move back and forth left and right, thereby improving the heat dissipation efficiency of the heat sink 203 itself and driving the surrounding air flow. The air flow can take away the heat from the outside of the main oil tank 101, further improving the heat dissipation efficiency and effect of the transformer, and at the same time avoiding the air stagnation between the two adjacent heat sinks 203, which affects the heat dissipation.

[0034] The heat sink 203 forms a dynamic fit contact with the outer surface of the main oil tank 101, which can also improve the heat conduction efficiency.

[0035] Further:

[0036] A mounting plate is fixed between the two support rods 103, on which a power shaft 206 rotates. A rotating plate 207 is fixed to the upper end of the power shaft 206, and a toggle pin 208 is fixed on the rotating plate 207 at a position offset from the power shaft 206. The toggle pin 208 slides in the long sliding hole 205 on the horizontal seat 201.

[0037] By installing the first motor on the mounting plate and driving the power shaft 206, the rotating plate 207 can be driven to rotate, thereby causing the toggle pin 208 to rotate eccentrically. As a result, the toggle pin 208 rotates eccentrically with the power shaft 206 as the axis in the long sliding hole 205, which will drive the cross seat 201 to slide back and forth on the two support rods 103, thereby forming a transmission for the heat sink 203 to slide back and forth left and right.

[0038] Further:

[0039] Two connecting holes 102 are horizontally provided on both the front and rear side surfaces of the main oil tank 101 , and the two connecting holes 102 on the same side are respectively located above and below the heat dissipation plate 203 , and an extension box 301 is installed at each connecting hole 102 through a buckle plate 302 .

[0040] Since the extension box 301 is connected to the main oil tank 101 through the connecting hole 102, the transformer oil in the main oil tank 101 can enter the extension box 301 through the connecting hole 102. When the heat sink 203 reciprocates to cause the air around it to flow, the two extension boxes 301 are located above and below the heat sink 203, so that the flowing air will better blow over the extension box 301, thereby dissipating heat for the extension box 301, thereby dissipating heat for the transformer oil in the extension box 301, and further dissipating heat for the transformer. This achieves the purpose of better utilizing the air flow generated by the movement of the heat sink 203 to dissipate heat for the transformer.

[0041] Moreover, since the extension box 301 protrudes from the outside of the main oil tank 101 and is filled with transformer oil, the surface area in contact with the air is increased, thereby making the extension box 301 itself have a certain heat dissipation effect, further improving the heat dissipation efficiency of the transformer;

[0042] Among them, it is worth mentioning that the extension box 301 and the buckle plate 302 are sealed and welded, the buckle plate 302 and the main oil tank 101 are fixed by bolts, and a sealing gasket is clamped between the buckle plate 302 and the main oil tank 101 to prevent transformer oil leakage.

[0043] Further:

[0044] A connecting pipe 501 is rotatably connected between the two extension boxes 301 on the same side.

[0045] By providing a plurality of connecting pipes 501, the transformer oil in the two extension boxes 301 is connected through the plurality of connecting pipes 501, and the contact area with the air is further increased through the connecting pipes 501, thereby improving the heat dissipation efficiency. At the same time, since the plurality of connecting pipes 501 are located on the outside of the heat dissipation plate 203, the air flow formed by the movement of the heat dissipation plate 203 can be further utilized for heat dissipation, thereby further improving the heat dissipation efficiency.

[0046] Further:

[0047] A hollow fin plate 502 extends outward from the middle of each connecting pipe 501 .

[0048] The hollow interior of the fin plate 502 allows the transformer oil in the connecting pipe 501 to enter the fin plate 502 , thereby further dissipating heat through the fin plate 502 and improving heat dissipation efficiency.

[0049] Further:

[0050] A sliding bracket 504 is fixed to the side of each connecting pipe 501 away from the fin plate 502 , and each sliding bracket 504 penetrates and slides in the sliding hole 204 on the corresponding arm plate 202 .

[0051] When the horizontal seat 201 drives the two arm plates 202 to move back and forth left and right, the arm plate 202 will drive the sliding column frame 504 to rotate with the connecting pipe 501 as the axis through the sliding hole 204 thereon, and then drive the connecting pipe 501 and the fin plate 502 to rotate back and forth with the connecting pipe 501 as the axis. The reciprocating rotating fin plate 502 can not only improve its own heat dissipation efficiency, but also assist the heat sink 203 to promote the flow of surrounding air, thereby further improving the heat dissipation efficiency of the transformer.

[0052] Further:

[0053] The lower end of each connecting pipe 501 is located on the side of the extension box 301 away from the fin plate 502 and is fixed with a transfer plate 505. A piston plate 401 slides in the extension box 301 below. A spring I 402 is provided between the piston plate 401 and the corresponding buckle plate 302, so that the piston plate 401 presses against multiple transfer plates 505. A one-way mechanism is provided at the piston plate 401 and the lower end of the connecting pipe 501, so that the transformer oil can only enter the extension box 301 below from the main oil tank 101, and then enter the connecting pipe 501 from the extension box 301 below.

[0054] When the connecting pipe 501 reciprocates, the connecting pipe 501 will drive the dial plate 505 to reciprocate with the connecting pipe 501 as the axis, and at the same time cooperate with the spring I 402 to make the piston plate 401 slide back and forth in the extension box 301. When the dial plate 505 is perpendicular to the connecting hole 102, the piston plate 401 is at the position closest to the connecting hole 102, and the internal space of the extension box 301 is the largest. When the dial plate 505 is tilted to point to the connecting hole 102, the piston plate 401 is at a position away from the connecting hole 102, and the internal space of the extension box 301 is reduced, thereby squeezing the transformer oil in the internal space of the extension box 301, so that the transformer oil enters the connecting pipe 501 through the one-way mechanism at the lower end of the connecting pipe 501. When the piston plate 401 is rotated again to point vertically toward the connecting hole 102, the piston plate 401 is at the position closest to the connecting hole 102. At this time, the internal space of the extension box 301 is maximized, thereby reducing the internal pressure of the extension box 301. This will open the one-way mechanism on the piston plate 401, and then draw the transformer oil in the main oil tank 101 into the extension box 301. This forms a circulation flow in which the transformer oil flows from the main oil tank 101 into the lower extension box 301, then from the lower extension box 301 into the connecting pipe 501, and then returns to the main oil tank 101 through the upper extension box 301. This ensures that the overall temperature of the transformer oil is uniform, and the oil in the main oil tank 101 flows between the two external extension boxes 301, thereby better improving the heat dissipation effect.

[0055] Further:

[0056] The one-way mechanism includes a cavity 403, in which a semicircular plug 404 slides. A spring II 405 is provided between one end of the cavity 403 and the semicircular plug 404, so that the semicircular plug 404 presses against and blocks the other end of the cavity 403.

[0057] When the one-way mechanism is installed on the piston plate 401, the cavity 403 passes through and is fixed on the piston plate 401, and the semicircular plug 404 presses against the cavity 403 port near the end of the main oil tank 101. When the piston plate 401 slides in the direction close to the main oil tank 101, the internal pressure of the extension box 301 decreases, so that the oil in the main oil tank 101 can overcome the elastic force of the spring II 405 and push the semicircular plug 404 to separate from the cavity 403 port, so that the oil in the main oil tank 101 can flow into the extension box 301 through the cavity 403. When the piston plate 401 slides in the direction away from the main oil tank 101, the internal pressure of the extension box 301 increases. The semicircular plug 404 is pressed against the cavity 403 port by the elastic force of the spring II 405 and is also affected by the high-pressure oil in the extension box 301 to press against the cavity 403 port, thereby ensuring that the one-way mechanism on the piston plate 401 is in a sealed state;

[0058] When the one-way mechanism is installed at the inner hole of the lower end of the connecting pipe 501, the two ends of the cavity 403 are connected to the interior of the connecting pipe 501 and the interior of the extension box 301 respectively, and the semicircular plug 404 presses the port at the lower end of the cavity 403. When the piston plate 401 slides toward the direction close to the main oil tank 101, the pressure inside the extension box 301 decreases. The semicircular plug 404 of the one-way mechanism at the connecting pipe 501 is pressed against the lower end port of the cavity 403 by the elastic force of the spring II 405, and is also pressurized by the relatively high pressure inside the connecting pipe 501. The high-pressure oil presses against the port of the cavity tube 403, ensuring that the one-way mechanism at the lower end of the connecting pipe 501 is in a sealed state; when the piston plate 401 slides away from the main oil tank 101, the internal pressure of the extension box 301 increases, and the oil in the extension box 301 can overcome the elastic force of the spring II 405, pushing the semicircular plug 404 to separate from the lower end port of the cavity tube 403, so that the oil in the extension box 301 can flow into the connecting pipe 501 through the cavity tube 403, realizing the one-way flow of transformer oil.

[0059] Further:

[0060] By providing a column cavity 503 at the end of each fin plate 502 away from the connecting pipe 501, the oil volume inside the fin plate 502 is increased, and the heat dissipation effect of the fin plate 502 on the internal transformer oil is improved;

[0061] A spiral rack 506 rotates within each column cavity 503. The central axis of each spiral rack 506 passes through the lower end of the corresponding fin plate 502. A transmission wheel 507 rotates at the lower end of the central axis of each spiral rack 506 via a one-way bearing. A plurality of fixed tooth plates 303 are fixed to the extension box 301 below. The plurality of fixed tooth plates 303 respectively mesh with the plurality of transmission wheels 507 for transmission.

[0062] In order to prevent the flowing transformer oil from flowing only in the connecting pipe 501 while the oil in the fin plate 502 has low fluidity, thereby affecting the overall heat dissipation effect of the transformer oil, a spiral rack 506 is installed on the fin plate 502. When the fin plate 502 rotates back and forth, it will drive the spiral rack 506 to rotate back and forth, and then the transmission wheel 507 on the central axis of the spiral rack 506 and the fixed gear plate 303 are displaced back and forth relative to each other, and then the central axis is driven by the one-way bearing to make the spiral rack 506 rotate intermittently in one direction, so that the oil inside the fin plate 502 is pushed by the spiral rack 506 to flow, so that the oil inside the fin plate 502 is mixed with the oil in the connecting pipe 501, thereby improving the heat dissipation effect when the oil circulates.

Claims

1. A power transformer, characterized in that: It includes a main fuel tank, and two support rods are vertically fixed on the right side of the main fuel tank. A cross seat slides through the two support rods, and arm plates are fixed at both ends of the cross seat. Multiple heat sinks are vertically fixed on the two arm plates, and each heat sink slides in contact with the corresponding side of the main fuel tank.

2. A power transformer according to claim 1, characterized in that: A mounting plate is fixed between the two support rods, a power shaft rotates on the mounting plate, a rotating plate is fixed on the upper end of the power shaft, a toggle pin is fixed at the position where the rotating plate is offset from the power shaft, and the toggle pin slides in the long sliding hole on the horizontal seat.

3. A power transformer according to claim 1, characterized in that: Two connecting holes are horizontally provided on both the front and rear side surfaces of the main oil tank, and the two connecting holes on the same side are respectively located on the upper and lower sides of the heat dissipation plate, and an extension box is installed at each connecting hole through a buckle plate.

4. A power transformer according to claim 3, characterized in that: A connecting pipe is rotatably connected between the two extension boxes on the same side.

5. A power transformer according to claim 4, characterized in that: A hollow fin plate is extended outward from the middle of each communicating pipe.

6. A power transformer according to claim 5, characterized in that: A sliding column frame is fixed on the side of each connecting pipe away from the fin plate, and each sliding column frame penetrates and slides in a sliding hole on the corresponding arm plate.

7. A power transformer according to claim 6, characterized in that: The lower end of each connecting pipe is located at the extension box and is fixed with a dial plate on the side away from the fin plate. A piston plate slides in the extension box below. A spring I is provided between the piston plate and the corresponding buckle plate to make the piston plate press against multiple dial plates. A one-way mechanism is provided at the piston plate and the lower end of the connecting pipe, so that the transformer oil can only enter the extension box below from the main oil tank, and then enter the connecting pipe from the extension box below.

8. A power transformer according to claim 7, characterized in that: The one-way mechanism includes a cavity tube, in which a semicircular plug slides. A spring II is provided between one end of the cavity tube and the semicircular plug, so that the semicircular plug presses tightly to seal the other end of the cavity tube.

9. The power transformer according to claim 5, characterized in that: Each fin plate is provided with a column cavity away from the end of the communicating pipe.

10. A power transformer according to claim 9, characterized in that: A spiral rack rotates in each column cavity, and the central axis of each spiral rack passes through the lower end of the corresponding wing plate. The lower end of the central axis of each spiral rack rotates a transmission wheel through a one-way bearing. A plurality of fixed tooth plates are fixed on the extension box below, and the plurality of fixed tooth plates are respectively engaged with the plurality of transmission wheels for transmission.

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